One-stage bilateral
(SD)
Unilateral control
(SD)
Anaesthesia Spinal/epidural
General
General + spinal/epidural
29
1
2
29
3
0
Blood loss Peroperative mL mean
Postoperative mL drainage mean
1181 (627)
539 (377)
574 (302)
353 (302)
Transfusion Cell saver used
Cell saver transfusion mL mean
Transfusion units mean
32
344 (196)
1.63 (1.43)
15
172 (126)
0.47 (0.98)
Operation Minutes in operation theatre mean
Minutes operating time mean per hip
410 (56)
133 (20)
206 (51)
119 (40)
Recovery Hospital stay mean days 10.2 (2.0) 7.6 (2.1)
Table 2: Surgery measurements